LM26CIM5 Datasheet, PDF (1/20 Pages) Texas Instruments – LM26 SOT-23, 3C Accurate, Factory Preset Thermostat

LM26
www.ti.com
SNIS115R – MAY 2001 – REVISED FEBRUARY 2013
LM26 SOT-23, ±3°C Accurate, Factory Preset Thermostat
Check for Samples: LM26
FEATURES
1
•2 Internal Comparator With Pin Programmable
2°C or 10°C Hysteresis
• No External Components Required
• Open Drain or Push-Pull Digital Output;
Supports CMOS Logic Levels
• Internal Temperature Sensor With V_TEMP
Output Pin
• V_TEMP Output Allows After-Assembly System
Testing
• Internal Voltage Reference and DAC for Trip-
Point Setting
• Currently Available in 5-pin SOT-23 Plastic
Package
• Excellent Power Supply Noise Rejection
• UL Recognized Component
APPLICATIONS
• Microprocessor Thermal Management
• Appliances
• Portable Battery Powered Systems
• Fan Control
• Industrial Process Control
• HVAC Systems
• Remote Temperature Sensing
• Electronic System Protection
KEY SPECIFICATIONS
• Power Supply Voltage 2.7V to 5.5V
• Power Supply Current 40μA (max) 20μA (typ)
• Hysteresis Temperature 2°C or 10°C (typ)
DESCRIPTION
The LM26 is a precision, single digital-output, low-
power thermostat comprised of an internal reference,
DAC, temperature sensor and comparator. Utilizing
factory programming, it can be manufactured with
different trip points as well as different digital output
functionality. The trip point (T_OS) can be preset at the
factory to any temperature in the range of −55°C to
+110°C in 1°C increments. The LM26 has one digital
output (OS/OS/US/US), one digital input (HYST) and
one analog output (V_TEMP). The digital output stage
can be preset as either open-drain or push-pull. In
addition, it can be factory programmed to be active
HIGH or LOW. The digital output can be factory
programmed to indicate an over temperature
shutdown event (OS or OS) or an under temperature
shutdown event (US or US). When preset as an
overtemperature shutdown (OS) it will go LOW to
indicate that the die temperature is over the internally
preset T_OS and go HIGH when the temperature goes
below (T_OS–T_HYST). Similarly, when preprogrammed
as an undertemperature shutdown (US) it will go
HIGH to indicate that the temperature is below T_US
and go LOW when the temperature is above
(T_US+T_HYST). The typical hysteresis, T_HYST, can be set
to 2°C or 10°C and is controlled by the state of the
HYST pin. A V_TEMP analog output provides a voltage
that is proportional to temperature and has a
−10.82mV/°C output slope.
Available parts are detailed in the ordering
information. For other part options, contact a Texas
Instruments Distributor or Sales Representative for
information on minimum order qualification. The
LM26 is currently available in a 5-lead SOT-23
package.
Table 1. Temperature Trip Point Accuracy
Temperature Range
−55°C to +110°C
+120°C
LM26CIM
±3°C (max)
±4°C (max)
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2001–2013, Texas Instruments Incorporated